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Fig. 1

View picture in original size
Fig. 2

View picture in original size
Fig. 3

Longines 18.69N(P)

Features
stem wind and pin set
sub second

Data
18''', Dm= 39.8mm, Do= 40.65mm
H= 6.1mm
F= 0.6mm
T= 2.4mm
15 jewels
f = 18000 A/h
power-reserve 36h

Balance staff U1057 / U956
(riveting collar 1.30 / 1.35mm)

Stem W267

Hands
1.70 x 0.60 / 0.26mm

Comments about the data

Remarks
open face calibre
bimetallic screw balance with 4 adjustment screws
Breguet hairspring
very early two-section regulator for coarse and fine adjustment (Fig.3)

family/generations:
18.69N(P): pin set, sub second
18.69N: set lever, sub second
18.69N(SC): set lever, sweep second
(all only stamped as 18.69N)

Example, year: signature; shock device
1912: 2836283, B&Co*** (Baume & Co., later Baume & Mercier), Swiss Made, 15 Jewels - 2836283, B&Co***, Longines

Not for Sale!
The movements presented in this caliber finder are not for sale. This is only a data sheet for identification and evaluation of the movement calibre, as well as for approximate dating.

bidfun-db 21.3 © 02-08-15, mtr-Ranfft


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